Tread lightly. What seems like great money to be making turns into small time quick if you don't know how to manage a business. In other words, don't let the "size" of the money impair your judgement on bidding job correctly. You think it's to good to be true that you can make a lot of money on a given job so you wind up bidding it too low. Basically I'm saying, don't leave money on the table. Don't expect to get every bid you place. If you do, you're pricing them too low.